To act in accordance with SpoonSpoon Law stating that as a girl, you must lie to the men that you sleep with to get what you want, use them for whatever they got, then endlessly talk smack about them to all your friends as if you aren't the lying cheating whore you really are.

Guy#1: "She told me she loved me, made me feel bad for her, let her use my car, then she ditched me as soon as she got her car back and told everyone I was an asshole. To top it all off, she's engaged to a man overseas in Iraq"!
Guy#2: "wow, yup, she's a spoonspoon alright"!